AirHint found the following cheapest return flights from Zurich (ZRH) to Sofia (SOF) in December 2025 (see full year).

Return flights

07 Dec - 08 Dec	Air Serbia
06 Dec - 08 Dec	Air Serbia
07 Dec - 09 Dec	Air Serbia
10 Dec - 14 Dec	Air Serbia
18 Dec - 12 Jan	easyJet
18 Dec - 25 Dec	easyJet
18 Dec - 26 Dec	easyJet
18 Dec - 01 Jan	easyJet
17 Dec - 25 Dec	Vueling Airlines
06 Dec - 07 Dec	Air Serbia
15 Dec - 28 Dec	easyJet
13 Dec - 28 Dec	Air Serbia
18 Dec - 05 Jan	easyJet
18 Dec - 04 Jan	easyJet
21 Dec - 06 Jan	Chair Airlines
25 Dec - 04 Jan	Air Serbia
22 Dec - 02 Jan	Air Serbia
27 Dec - 02 Jan	Lufthansa
23 Dec - 01 Jan	Condor
30 Dec - 02 Jan	Austrian Airlines

Also check the deals for one-way flights from Zurich to Sofia in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Zurich to Sofia in December from 165€

Return flights